So um, I'm getting nervous now

I had my first ocean swim yesterday and it was horrendous.  It was also freezing!  I can't believe I'm going to do it all over again tomorrow, but at 7am!  Today is cold and rainy and tomorrow morning should be the same.  I'm going to go for a short bike ride today since I've never ridden in the rain before either. I've also skimped on the workouts over the week end and this week because we went camping and I've been on vacation at home (we had some issues to deal with).  Yesterday after the swim in the ocean I did a transtion to bike, went a very short distance, transitioned to run and ran another short distance just to go through all 3 motions together.  I'm pretty confident I can survive this, but I'm still a little nervous.